Collaboration among professionals is a vital component for successful inclusion of students with disabilities. In many cases, teacher preparation programs assume that teacher candidates know how to collaborate without explicit instruction or authentic practice and, therefore, omit coursework on collaboration. Alternatively, some programs may require coursework in collaboration but that coursework may exclude candidates from any other programs. In this article, we describe candidate outcomes from a course about collaboration that was taught in two ways: (a) as a co-taught course with faculty and candidates from social studies and special education and (b) as a course in the special education program that included only faculty and candidates in special education. Candidates in both groups constructed pre- and post-course concept maps about collaboration. We conducted both quantitative and qualitative analyses to determine depth, breadth, and complexity of understanding of collaboration as well as growth in these areas. Findings and implications are discussed.